http://http://dspace.unitus.it:80 The DSpace digital repository system captures, stores, indexes, preserves, and distributes digital research material. Wed, 22 May 2013 22:33:52 GMT 2013-05-22T22:33:52Z http://hdl.handle.net/2067/1623 Title: Study of Wall Paintings and Mosaics by means of Ultraviolet Fluorescence and False Colour Infrared Photography Authors: Castro, Fabio; Pelosi, Claudia Abstract: This paper reports the results of the application of ultraviolet (UV) fluorescence and false colour infrared (IRC) photography to the study of wall paintings and mosaics. The case studies proposed in this work are the wall paintings in the crypt of the medieval church of Sant’Andrea in Viterbo (Italy) and the fragment of wall mosaic with an Angel, coming from the Giotto Navicella, at present placed in the Grotte Vaticane. This mosaic fragment was examined on the occasion of the restoration carried out from November 2004 to February 2006. This restoration intervention was promoted and funded by Bonifacio VIII Committee on the occasion of the celebrations for the VII centenary of the death of Bonifacio VIII. Ultraviolet (UV) fluorescence and false colour infrared (IRC) photography are non invasive methods of analysis useful for a preliminary and sometimes resolutive investigations of works of art. The main advantage of these techniques is their simplicity and inexpensiveness but, at the same time, they made possible an overall examination of the work of art before starting with more sophisticated and in-depth investigations. There are few references about the application of this kind of analyses to the study of wall paintings and mosaics, so the aim of this research was to apply these photographic methods to some wall decorations and at the same time to several specimens carried out in laboratory to have a valid comparison. The aim was also to prove the potentiality and usefulness of these methods especially in the examination of mosaics because taking samples for laboratory analyses is often impossible. Sun, 31 May 2009 22:00:00 GMT http://hdl.handle.net/2067/1623 2009-05-31T22:00:00Z http://hdl.handle.net/2067/1745 Title: The wall paintings of the crypt of the medieval Church of Saint Andrew in Viterbo (Italy): technical examination and state of preservation Authors: Castro, Fabio; Falcucci, Claudio; Pelosi, Claudia Abstract: The wall paintings of the crypt of the church of Saint Andrew in Viterbo (Italy) date back to the 13th century. The bad state of preservation and the lack of many areas of the scenes make difficult a clear interpretation of the paintings and therefore a precise historical placing inside the 13th century. Besides an extensive analysis of the execution techniques and of the constitutive materials has never been undertaken. So the aim of this research has been to characterize the constitutive materials and the execution techniques of the wall paintings in order to provide a valid aid to the historical and artistic interpretation of the iconography and to evaluate the state of preservation of the paintings related to the environment. The wall paintings have been studied by means of non invasive methodologies of analysis and through laboratory techniques. The in situ investigations have been carried out by ultraviolet (UV) fluorescence and false colour infrared (IRC) photography, reflectance spectrophotometry, video microscope acquisitions, XRF spectrometry. These preliminary investigations have been useful to chose the sampling points for the laboratory analysis. The micro samples were examined through FTIR spectrometry and polarizing microscope observation of the pigment powders and of the cross sections. The pigments employed for the wall paintings are: red and yellow ochre, calcium carbonate white, lead based pigments probable red lead, green earth, vegetable black. They have been applied by a lime technique. The photographic campaign and the technical examination of the wall paintings also put in evidence the presence of surface damages. In particular, the abundant superficial salt deposits are the result of the use of unsuitable restorations materials in previous interventions. The environmental conditions (temperature and relative humidity) were registered by means of a digital data logger. During the months of October, November, and December 2009 the RH% values exhibit high average values, from 71 to 83%. The lowest RH% value (43%) has been registered on the fifteen of October, the highest one (86%) has been measured on the thirty-one of December. We believe that this study to be necessary for the future preservation and conservation of these interesting medieval wall paintings. Thu, 31 Dec 2009 23:00:00 GMT http://hdl.handle.net/2067/1745 2009-12-31T23:00:00Z http://hdl.handle.net/2067/1752 Title: Project on the rock paintings in Cappadocia. Analytical investigation of the church of Forty Martyrs in Şahinefendi and other sites (Report 2008) Authors: Pelosi, Claudia; Santamaria, Ulderico; Agresti, Giorgia; Castro, Fabio; Lotti, Davide; Pogliani, Paola Abstract: This report will relate about the main results of the analyses carried out on the rock paintings of several Cappadocia churches. The analyses have been carried out within the survey “Rock paintings in Cappadocia. For a project of knowledge, conservation and valorization of the church of the Forty Martyrs at Şahinefendi and its territory” directed by Prof. Maria Andaloro of Tuscia University (Italy) . Such analyses have been carried out according to a methodological path tested during the several years of surveys in Turkey, particularly on the island of Küçük Tavşan and on many other sites in the territory of Mandalya Gulf and also on the occasion of other research projects . This research mission is part of a bigger project called “For a data bank of wall paintings and mosaics of Asia Minor (4th-15th centuries: images, materials, techniques of execution (1996-2010)” directed by Prof. Maria Andaloro. The aim of this work concerns the understanding of the constitutive materials, the execution techniques and the conservation conditions of the rock paintings. For this reason several in situ and laboratory analyses have been undertaken. In the first part of this report the main results of the analyses carried out during the 2008 campaign on the Forty Martyrs Church at Şahinefendi and of a group of churches in the region of Nevşheir will be described. In the second one an overall view on the three years analyses of the materials collected during the surveys will be shortly presented. The attention will be focused on the pigments of the rock paintings with some reference to the stratigraphic analyses and to the binders of the pigments. Thu, 31 Dec 2009 23:00:00 GMT http://hdl.handle.net/2067/1752 2009-12-31T23:00:00Z